se·go lily /ˈsi(ˌ)go-/
  sego lily
       n : perennial plant having umbellike clusters of one to four
           showy white bell-shaped flowers atop erect unbranched
           stems; edible bulbs useful in times of scarcity; eastern
           Montana and western North Dakota south to northern
           Arizona and northwestern New Mexico [syn: Calochortus
           nuttallii]